CVE-2026-105207 ZITADEL - Authentication Bypass

ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.17.3 contains an authentication bypass caused by linking user accounts to external identity providers without verifying primary factors or caller permissions, letting unauthenticated attackers bind external identities and sign in as victims, exploit requires knowledge of victim's login name.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
4 October 2026
Updated
15 October 2026
Weakness
CWE-306

Vendor fix

Update to version 3.4.16, 4.17.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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